<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        .a{
            width: 900px;
            height: 300px;
            background-color:blueviolet ;
            position: relative;
            text-align: center;           
        }
        table{
            position: absolute;
            width: 800px;
            height: 250px;
            margin-left: 50px;
            margin-top: 25px;
            border-collapse: collapse;

        }
        th{
            border: 1px solid #999;
            background-color: rgb(151, 120, 180);
            color: purple;
        }
        td{
            border: 1px solid #999;
            background-color: cornsilk;
            color: #999;
        }
    </style>
</head>
<body>
    <div class="a">
        <table>
            <tr>
                <th>转入时间</th>
                <th width="30%">产生效益</th>
                <th>首次发放收益时间</th>
            </tr>
            <tr>
                <td>周四15:00(含15:00)~周五15:00</td>
                <td>下周一</td>
                <td>下周二</td>
            </tr>
            <tr>
                <td>周五15:00(含15:00)~下周一15:00</td>
                <td>下周二</td>
                <td>下周三</td>
            </tr>
            <tr>
                <td>周一15:00(含15:00)~周二15:00</td>
                <td>周三</td>
                <td>周四</td>
            </tr>
            <tr>
                <td>周二15:00(含15:00)~周三15:00</td>
                <td>周四</td>
                <td>周五</td>
            </tr>
            <tr>
                <td>周三15:00(含15:00)~周四15:00</td>
                <td>周五</td>
                <td>周六</td>
            </tr>
        </table>
    </div>
</body>
</html>